Frickin Frackin Merc Trim Trouble

Lennyd123

Seaman
Joined
Aug 1, 2005
Messages
62
Searched around and could not find a similar issue

App is a 89 7.4L Bravo 1

Both the limit and sender are trash (do not need the gauge, and how the boat handles is my guide lol) and the wire leads are broken in several places.

My problem is that even though I jumped out the blue lead by the pump last year so it would allow the up and trailer switch to work it has now stopped working, and I can not seem to "rig" it to work again so I am seeking some ideas.

I thought I found my problem when I found that the blue (actually blue with white stripe correct?) wire was broken in the plug at the pump, but after jumping out the plug and running it directly to the solenoid where the blue wire mounts from the plug it is still not working.

Damn I thought I had it pegged when I finally found that wire was no longer connected to the spade connector within the plug, but like everything else marine there just don't seem to be any easy breaks lol.

I have read through a few different manuals I found online and from everything I can see it should be working with the way it is currently hooked up.

Am I missing something? Well obviously yes, but what do you think it could be?

I have not had anyone around to help with testing voltage with the two switches on so I do not have that info yet, but since I have a bunch of other work to do over the next few days that also will require an extra set of hands (finally gave into the idea of bypassing the infamous bravo raw water transom hose and install a thru hull, replacing a couple bilge/sump pumps etc) I should be able to test just about anything.

Oh and though I know they do go bad the solenoid is about a year or two old, but I do have two old ones that should be in working order that I replaced when the limit switch was giving me trouble.

Guess I am just a bit perplexed at the moment since I thought I had bypassed the problem area of the switch mounted on the gimbal and it should just work etc lol

The down works just fine, and the up does work when jumped out with a screwdriver etc.

Thanks in advance!
 

45Auto

Commander
Joined
May 31, 2002
Messages
2,842
Re: Frickin Frackin Merc Trim Trouble

You said it was working earlier.

If you're getting power to the solenoid when you hit the switch, the solenoid is bad.

If you're not getting power to the solenoid when you hit the switch, then your problem is in the wiring or the switch.

Not much else anyone here can tell you without being there with a meter checking wiring. If the switch isn't getting power then the problem is in the wiring before the switch. If the input side of the switch is getting power but it doesn't make it to the output side then the problem is the switch. If the output of the switch has power but it doesn't make it to the solenoid it's between the switch and the solenoid.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,958
Re: Frickin Frackin Merc Trim Trouble

The down works just fine, and the up does work when jumped out with a screwdriver etc.

Ayuh,... It's either corroded connections, or whatever yer jumpin' with the screwdriver is shot...

Polish the connections shiney clean with sand paper, reassemble it, 'n grease the connections so's it don't happen again...
Or,...
Replace what yer jumpin'....
 

mpdive

Chief Petty Officer
Joined
Apr 23, 2011
Messages
567
Re: Frickin Frackin Merc Trim Trouble

You should run power directly to the motor on first the blue wire and then the green. The motor is directional. Verify that you first have a working motor that reverses and work the problem back to the solenoids. Make sure you clean and emery cloth all connections and apply liquid electrical tape to them. If the solenoid has power going to it and is clicking it's probably bad. Replace both at the same time. That's the way I do it.
 

Lennyd123

Seaman
Joined
Aug 1, 2005
Messages
62
Re: Frickin Frackin Merc Trim Trouble

Not much else anyone here can tell you without being there with a meter checking wiring.

I will be working on it over the weekend, what time you guys want to come :)

Seriously I am waiting on another set of hands to check out the wiring before I start replacing stuff (thats how I ended up w all new sels and even had an extra that I swapped out w the starter sel lol)

I will take the advice of cleaning up all the contact points as that has not been done since 07 when I first gave up on changing the senders anymore etc.

One other thing that seems odd and I need to check out more thoroughly is the mercathode wiring as for some reason it is like at the same time the up prob came back was during the recent engine pull to reinstall the flywheel correctly to stop the out of balance vibration that I am not burning through zincs as fast, and now there is only 1 wire on the right most terminal when I distinctly remember there was 2. Its the 5th one from the left and a sheet metal type screw.

Not sure if its related, but I know my system runs wires from the mercathode and position sender through that unit.

Could a mis wiring there even cause this? Doesnt seem like it could by the wire diag I have seen, but sometimes experience trumps all so let me know.

Oh and thanks for The replies as I know my info was not the most telling etc
 

mpdive

Chief Petty Officer
Joined
Apr 23, 2011
Messages
567
Re: Frickin Frackin Merc Trim Trouble

I don't think Frickin Frackin is an OEM replacement part. I did a google search for it and nothing came up!:D
 

Lennyd123

Seaman
Joined
Aug 1, 2005
Messages
62
Re: Frickin Frackin Merc Trim Trouble

google lol

The title would have been different, but the website profanity scan flagged what I wanted to say :)
 

45Auto

Commander
Joined
May 31, 2002
Messages
2,842
Re: Frickin Frackin Merc Trim Trouble

at the same time the up prob came back was during the recent engine pull to reinstall the flywheel correctly

Get a wiring diagram and see which wires you hooked up wrong ..... :)
 

Lennyd123

Seaman
Joined
Aug 1, 2005
Messages
62
Re: Frickin Frackin Merc Trim Trouble

I was re thinking that statement, and it may not be 100% accurate as I am not the kind of guy to go through all that work and not be able to trim up (I know it could be possible to miss it as it was on the trailer and launched right after the work and was in up position) and I must have used the trailer at min at a popular anchorage here so it must have worked.

I am now thinking it could have happened either during a ps low press line failure, or something got moved or broken while diagnosing/repairing the cooling problem.

So maybe the wiring to mercathode was wrong prev and just happened to end up correct this last time lol

Not sure if the wiring there could even cause this problem, but Ido have two diagrams, and even a pic for visual that are supposed to be for my model and year.

If the weather is good should have a solutuion or additional questions post up by mon afternoon.
 
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